Questions and Answers
According to the rules, can variable names begin with a digit?
No, variable names cannot start with a digit
Which of the following characters can be used in variable names?
Letters, digits, underscores, and dollar signs
What does the use of the 'final' keyword indicate about a variable?
The variable is constant and unchangeable
Can reserved words be used as variable names?
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Are variable names case sensitive in programming languages?
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Study Notes
Variables in C#
- Variables are containers for storing data values.
- In C#, there are different types of variables, including:
-
string: stores text, such as "Hello". -
int: stores integers, without decimals, such as 123 or -123. -
float: stores floating point numbers, with decimals, such as 19.99 or -19.99. -
char: stores single characters, such as 'a' or 'B'. -
bool: stores values with two states: true or false.
-
Creating Variables
- To create a variable, you must specify the type and assign it a value using the format:
type variableName = value; - The
typecan beint,string, or other data types, andvariableNameis the name of the variable (e.g.x). - The
=symbol is used to assign values to the variable.
Assigning Values
- If you assign a new value to an existing variable, it will overwrite the previous value.
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